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Table 3 PTR values in herds of different size within each herd category (ImpoCattle or NoImpoCattle)

From: Evaluation of temporal surveillance system sensitivity and freedom from bovine viral diarrhea in Danish dairy herds using scenario tree modelling

    PTR with 1 PI PTR with 1 TI cow
Herd category Test Herd size (in cows) HRP = 90 days HRP = 365 days HRP = 90 days HRP = 365 days
ImpoCattle blocking ELISA 24 175 (35.0) 343 (68.6) 0 (0.0) 23 (4.6)
   180 0 (0.0) 206 (41.2) 0 (0.0) 2 (0.4)
   1070 0 (0.0) 14 (2.8) 0 (0.0) 0 (0.0)
  SVANOVIR 24 468 (93.6) 486 (97.2) 165 (33.0) 308 (61.6)
   180 240 (48.0) 376 (75.2) 0 (0.0) 38 (7.6)
   1070 3 (0.6) 281 (56.2) 0 (0.0) 9 (1.8)
NoImpoCattle blocking ELISA 1 500 (100.0) 500 (100.0) 500 (100.0) 500 (100.0)
   123 0 (0.0) 248 (49.6) 0 (0.0) 3 (0.6)
   1185 0 (0.0) 8 (1.6) 0 (0.0) 0 (0.0)
  SVANOVIR 1 500 (100.0) 500 (100.0) 500 (100.0) 500 (100.0)
   123 314 (62.8) 397 (79.4) 2 (0.4) 47 (9.4)
   1185 1 (0.2) 278 (55.6) 0 (0.0) 12 (2.4)
  1. PTR Iterations out of 500 (in %), where the threshold prevalence of antibody positive milking cows was reached in a herd, using the stochastic simulation model by Foddai et al. [9] and according to test used (blocking ELISA vs. SVANOVIR) sampling day (HRP of 90 or 365 days), and BVDV introduction route (PI calf or TI cow)